CN104218817A - Variable-frequency power circuit and direct-current energy storing device - Google Patents

Variable-frequency power circuit and direct-current energy storing device Download PDF

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Publication number
CN104218817A
CN104218817A CN201310211948.7A CN201310211948A CN104218817A CN 104218817 A CN104218817 A CN 104218817A CN 201310211948 A CN201310211948 A CN 201310211948A CN 104218817 A CN104218817 A CN 104218817A
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electric capacity
those
terminal
flat copper
copper bar
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CN104218817B (en
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韦强
周代平
叶楠
李庆友
陈玮
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Delta Electronics Shanghai Co Ltd
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Delta Electronics Shanghai Co Ltd
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Abstract

The invention discloses a variable-frequency power circuit and a direct-current energy storing device. The variable-frequency power circuit comprises a rectifying stage, an inverting stage and a direct-current energy storing module, wherein the direct-current energy storing module is electrically connected between the rectifying stage and the inverting stage, and comprises a plurality of capacitance units and a plurality of conductive flat copper bars; the plurality of capacitance units are arranged on the same plane, and are divided into a plurality of capacitance rows; each capacitance unit is provided with a positive terminal and a negative terminal respectively; the positive terminal and the negative terminal of each capacitance unit in the same capacitance row are arranged in the same direction; and the conductive flat copper bars are used for connecting the capacitance rows in order to connect the plurality of capacitance units in the same capacitance row in parallel and connect the plurality of capacitance rows in series. Compared with the prior art, the variable-frequency power circuit and the direct-current energy storing device have the advantage that a high-capacity direct-current energy storing module needed by a variable-frequency system of a high power level can be realized conveniently. Moreover, the direct-current energy storing device has high electrical performance, assembling performance and testing performance, and is low in cost.

Description

Frequency conversion power circuit and DC energy storage device
Technical field
File of the present invention has about a kind of electric power system, espespecially a kind of frequency conversion power circuit and capacitive component wherein.
Background technology
Frequency converter (Variable-frequency Drive, VFD), be application converter technique and electronics driving component technology, frequency converter can input according to different three-phase powers (frequency and the amplitude of such as three-phase input change) and produce different power stages.Frequency converter is often found in the applications such as generating set, the control circuit of induction motor, the circuit for power conversion of large power, electrically force signal.
Frequency converter (Variable-frequency Drive, VFD) is application converter technique and microelectric technique, is controlled the Electric Drive assembly of alternating current motor by the mode of the frequency and amplitude that change machine operation power supply.Wherein, mesohigh big-power transducer is widely used in the aspects such as large fan, water pump, traction, transmission at present.
The capacitor that existing frequency conversion system generally includes rectifier, inverter and is coupled between the two.Along with the raising of power level, the large-scale capacitor device of high capacity need be set in other frequency conversion system of middle high power grade, be difficult to the high capacity needed for being realized by single capacitance component.Usual needs series connection and/or multiple capacitance component in parallel could be realized.
The wherein one of the frequency conversion system (such as operating current is person more than 400 amperes) of current high power levels is designed to radiator top layer up, many electrochemical capacitors are divided into multilayer to be arranged in below (multilayer electrochemical capacitor is separated by glass reinforced plastic support respectively), and the semiconductor subassembly such as rectifier and inverter is between two-layer up and down.But this kind of design, due in the middle of semiconductor device plant radiator and electrochemical capacitor, is assembled difficult so busbar, semiconductor connect the related accessory such as copper bar.Along with current level improve, electrochemical capacitor quantity increase, whole unit ratio by numerous imbalances, power density degradation.In addition, for the high voltage converter of high-power (more than 400A), electrochemical capacitor quantity is large, and whole power cell volume is large, thus the system power cabinet of composition is long-pending large, thus power density is low.That is, the shortcomings such as this kind of design exists assembling difference, power upgrading is difficult, test performance is poor, system power-density is low and system cost is high.
Another of the frequency conversion system of current high power levels is designed to radiator at top layer, and many electrochemical capacitors are arranged in bottom and are divided into two rows, and two row's electrochemical capacitors are head to head or back-to-back arrangement.But, need after connecting through multiple busbars of cutting in this kind of design, then be connected with semiconductor respectively by multiple busbar.This design also exists that busbar design is complicated, test performance is poor, system power-density is low and the shortcoming such as system cost is high.
Summary of the invention
The present invention proposes a kind of frequency conversion power circuit and DC energy storage module wherein, DC energy storage module comprises multiple capacitor cell and to be arranged as on same plane and to be divided into multiple electric capacity to arrange, and electropositive terminal and the elecrtonegativity terminal of each capacitor cell in same electric capacity row have identical orientation.The flat copper bar of multiple conduction is in order to connect multiple electric capacity row, multiple capacitor cells in same electric capacity row are connected in parallel to each other, and multiple electric capacity row is one another in series, and the semiconductor subassembly of this rectification stage and this inverse cascade and those capacitor cells are arranged on same plane, the high-capacity direct current energy-storage module (direct current capacitor) needed for frequency conversion system of high power levels can be realized thus expediently.The DC energy storage module formed in this way, has preferably electric property, assembly performance, test performance and lower cost.For the frequency conversion power circuit system of entirety, there is preferably power density, heat dispersion, assembly performance, power expansion and lower cost.
An aspect of the present invention is providing a kind of frequency conversion power circuit, comprises rectification stage, inverse cascade and DC energy storage module.Rectification stage is electrically connected to power input end.Inverse cascade is electrically connected to power output end.DC energy storage module is electrically connected between rectification stage and inverse cascade, wherein DC energy storage module comprises multiple capacitor cell and the flat copper bar of multiple conduction, multiple capacitor cell to be arranged as on same plane and to be divided into multiple electric capacity to arrange, each capacitor cell has an electropositive terminal and an elecrtonegativity terminal respectively, and electropositive terminal and the elecrtonegativity terminal of each capacitor cell in same electric capacity row have identical orientation.The flat copper bar of multiple conduction, in order to connect multiple electric capacity row, makes the multiple capacitor cells in same electric capacity row be connected in parallel to each other, and multiple electric capacity row is one another in series.
According to one embodiment of the invention, those capacitor cells comprise X electric capacity row, and each electric capacity row has Y capacitor cell, and X and Y is respectively the positive integer of more than 2.
According to one embodiment of the invention, those conduction flat copper packages are containing the female flat copper bar of anode, the female flat copper bar of a negative terminal and the flat copper bar of (X-1) bar equipotential, the female flat copper bar of this anode is electrically connected all electropositive terminal to one first current potential terminals of this Y capacitor cell on the 1st electric capacity row, and the female flat copper bar of this negative terminal is electrically connected all elecrtonegativity terminal to one second current potential terminals of this Y capacitor cell on X electric capacity row.
According to one embodiment of the invention, each the electropositive terminals of those capacitor cells on each the elecrtonegativity terminals of those capacitor cells on an adjacent electric capacity row and another adjacent electric capacity row should be electrically connected at respectively by (X-1) bar equipotential flat cable copper bar.
According to one embodiment of the invention, those electric capacity row is divided into multiple electric capacity row of a first part and multiple electric capacity rows of one second part, this electropositive terminal and this elecrtonegativity terminal of each capacitor cell in those electric capacity row of this first part have identical first order direction, this electropositive terminal and this elecrtonegativity terminal of each capacitor cell in those electric capacity row of this second part have identical second order direction, and this first order direction is relative with this second order direction.
According to one embodiment of the invention, those electric capacity of this first part and this second part arranges and are comprised X electric capacity respectively and arrange, and each electric capacity has Y capacitor cell on arranging, and X and Y is respectively the positive integer of more than 2.
According to one embodiment of the invention, those conduction flat copper packages are containing the female flat copper bar of an anode, the female flat copper bar of a negative terminal and the flat copper bar of (X-1) bar equipotential, wherein the female flat copper bar of this anode is electrically connected all electropositive terminals of the 1st electric capacity row those capacitor cells upper of this first part and X electric capacity row those capacitor cells upper of this second part, and the female flat copper bar of this negative terminal is electrically connected all elecrtonegativity terminals of X electric capacity row those capacitor cells upper of this first part and the 1st electric capacity row those capacitor cells upper of this second part.
According to one embodiment of the invention, the 1st article of flat copper bar of equipotential is electrically connected at the electropositive terminal of the elecrtonegativity terminal of the 1st electric capacity row those capacitor cells upper of this first part, the electropositive terminal of the 2nd electric capacity row those capacitor cells upper of this Part I, the elecrtonegativity terminal of the 3rd electric capacity row those capacitor cells upper of this Part II and the 2nd electric capacity row those capacitor cells upper of this Part II respectively.
According to one embodiment of the invention, semiconductor subassembly and those capacitor cells of rectification stage and inverse cascade are arranged on same plane.The DC energy storage module formed in this way, has preferably electric property, assembly performance, test performance and lower cost.For the frequency conversion power circuit system of entirety, there is preferably power density, heat dispersion, assembly performance, power expansion and lower cost.
According to one embodiment of the invention, wherein frequency conversion power circuit also comprises a radiator, is arranged at this inverse cascade, and the semiconductor subassembly of this rectification stage and this inverse cascade and those capacitor cells are arranged on same plane with this radiator.Further, according to one embodiment of the invention, capacitor cell is respectively an electrolytic capacitor.
Another aspect of the present invention is providing a kind of frequency conversion power circuit, comprises rectification stage, inverse cascade and DC energy storage module.Rectification stage is electrically connected to a power input end.Inverse cascade is electrically connected to a power output end.DC energy storage module is electrically connected between this rectification stage and this inverse cascade, and wherein this DC energy storage module comprises multiple capacitor cell and the flat copper bar of multiple conduction.Those capacitor cells to be arranged as on same plane and to be divided into multiple electric capacity to arrange, semiconductor subassembly and those capacitor cells of this rectification stage and this inverse cascade are arranged on same plane, each capacitor cell has an electropositive terminal and an elecrtonegativity terminal respectively, this electropositive terminal and this elecrtonegativity terminal of each capacitor cell in same electric capacity row have identical orientation, wherein those capacitor cells comprise X electric capacity row, each electric capacity row has Y capacitor cell, and X and Y is respectively the positive integer of more than 2.The flat copper bar of multiple conduction is in order to connect those electric capacity row, those conduction flat copper packages are containing the female flat copper bar of an anode, the female flat copper bar of one negative terminal and the flat copper bar of (X-1) bar equipotential, wherein the female flat copper bar of this anode is electrically connected all electropositive terminals of the 1st upper this Y capacitor cell of electric capacity row, the female flat copper bar of this negative terminal is electrically connected all elecrtonegativity terminals of X upper this Y capacitor cell of electric capacity row, each the electropositive terminals of those capacitor cells on each the elecrtonegativity terminals of those capacitor cells on an adjacent electric capacity row and another adjacent electric capacity row should be electrically connected at respectively by the flat copper bar of (X-1) bar equipotential, those conduct electricity flat copper bar in order to make same electric capacity arrange in capacitor cell be connected in parallel to each other, and those electric capacity row is one another in series.
According to one embodiment of the invention, wherein frequency conversion power circuit also comprises a radiator, is arranged at this inverse cascade, and the semiconductor subassembly of this rectification stage and this inverse cascade and those capacitor cells are arranged on same plane with this radiator.Further, according to one embodiment of the invention, capacitor cell is respectively an electrolytic capacitor.
Another aspect of the present invention is providing a kind of DC energy storage device, is applicable to a frequency conversion power circuit and comprises a rectification stage and an inverse cascade, and this DC energy storage device comprises multiple capacitor cell and the flat copper bar of multiple conduction.Multiple capacitor cell is electrically connected between this rectification stage and this inverse cascade, those capacitor cells to be arranged as on same plane and to be divided into multiple electric capacity to arrange, each capacitor cell has an electropositive terminal and an elecrtonegativity terminal respectively, and this electropositive terminal and this elecrtonegativity terminal of each capacitor cell in same electric capacity row have identical orientation.The flat copper bar of multiple conduction, in order to connect those electric capacity row, makes the capacitor cell in same electric capacity row be connected in parallel to each other, and those electric capacity row is one another in series.
According to one embodiment of the invention, wherein frequency conversion power circuit also comprises a radiator, is arranged at this inverse cascade, and the semiconductor subassembly of this rectification stage and this inverse cascade and those capacitor cells are arranged on same plane with this radiator.Further, according to one embodiment of the invention, capacitor cell is respectively an electrolytic capacitor.
Accompanying drawing explanation
For above and other object of the present invention, feature, advantage and embodiment can be become apparent, the description of the drawings is as follows:
Fig. 1 illustrates the functional block diagram according to frequency conversion power circuit a kind of in one embodiment of the invention;
Fig. 2 illustrates the structural representation of frequency conversion power circuit in Fig. 1 and DC energy storage module thereof;
Fig. 3 illustrates the structure schematic top plan view according to DC energy storage module a kind of in one embodiment of the invention;
Fig. 4 illustrates the schematic top plan view of other assemblies in DC energy storage module in the embodiment of Fig. 3 and frequency conversion power circuit;
Fig. 5 illustrates the schematic top plan view of the DC energy storage module in another embodiment according to file of the present invention in frequency conversion power circuit; And
Fig. 6 illustrates the section graph of a relation of the flat copper bar of each conduction according to another embodiment of the present invention.
Embodiment
Below will disclose multiple execution mode of the present invention with accompanying drawing, as clearly stated, the details in many practices will be explained in the following description.But should be appreciated that, the details in these practices is not applied to limit the present invention.That is, in some embodiments of the present invention, the details in these practices is non-essential.In addition, for simplifying for the purpose of accompanying drawing, some existing usual structures and assembly illustrate it by the mode simply illustrated in the accompanying drawings.
Refer to Fig. 1 and Fig. 2, Fig. 1 illustrates the functional block diagram according to frequency conversion power circuit 100 a kind of in one embodiment of the invention, and Fig. 2 illustrates the structural representation of frequency conversion power circuit 100 in Fig. 1 and DC energy storage module 140 thereof.
As shown in Figure 1, frequency conversion power circuit 100 comprises rectification stage 120, DC energy storage module 140 and inverse cascade 160.In this embodiment, rectification stage 120 is electrically connected to power input end PIN.For example, as shown in Figure 1, power input end PIN can be outside three-phase power input, but file of the present invention is not as limit.Inverse cascade 160 is electrically connected to power output end POUT, and power output end POUT further can promote follow-up electrical load or control other follow-up electronic building brick (not shown).Rectification stage 120 in Fig. 1 is only exemplary citing with the internal circuit configuration (rectification stage 120 and inverse cascade 160 are respectively three-phase bridge rectifier and suitching type switching inverter in this example) of inverse cascade 160, and file of the present invention is not as limit.
DC energy storage module 140 is electrically connected between rectification stage 120 and inverse cascade 160, and the electric signal be used between temporary rectification stage 120 and inverse cascade 160 on two direct current arms, DC energy storage module 140 has the functions such as energy storage, impedance matching, noise filtering.In addition, in other frequency conversion power circuit 100 of middle high power grade, DC energy storage module 140 is comparatively difficult to Single Capacitance assembly realize, and jointly need be formed by multiple capacitive component.
As shown in Figure 2, the DC energy storage module 140 in the present embodiment comprise multiple capacitor cell (as C1, C2, C3, C4, C5 ... and the flat copper bar of multiple conduction (as LP, L1, L2 and LN) CN).In an embodiment, capacitor cell is respectively an electrolytic capacitor.
Wherein, multiple capacitor cell to be arranged as on same plane and to be divided into multiple electric capacity to arrange, and in this embodiment, the capacitor cell in DC energy storage module 140 is divided into three electric capacity row R1, R2 and R3, the convenience for illustrating in this embodiment is mainly described with three electric capacity rows.Need remark additionally, the electric capacity row in DC energy storage module 140 of the present invention is not limited with three rows, and in other embodiments, DC energy storage module 140 can comprise X electric capacity row, and X is more than 2 arbitrary positive integers.
Each electric capacity row R1, R2 or R3 have N number of capacitor cell, and the electric capacity row R1 as the 1st row has capacitor cell C1, C2, C3, C4, C5 ... CN.That is, DC energy storage module 140 has 3 × N number of capacitor cell altogether, is divided into three rows (electric capacity row R1, R2 or R3) to be arranged on same plane.
See also Fig. 3, it illustrates the structure schematic top plan view according to DC energy storage module 140 a kind of in one embodiment of the invention.
As shown in Figure 2 and Figure 3, the flat copper bar of multiple conductions in DC energy storage module 140 is (as LP, L1, L2 and LN) in order to connect multiple electric capacity row (as R1, R2 and R3), all capacitor cells in same electric capacity row are connected in parallel to each other, and above-mentioned multiple electric capacity row is one another in series.
As shown in Figure 3, each capacitor cell C1 ~ CN has electropositive terminal and elecrtonegativity terminal respectively, electropositive terminal and the elecrtonegativity terminal of each capacitor cell C1 ~ CN in same electric capacity row (R1, R2or R3) have identical orientation.In the embodiment of Fig. 3, the electropositive terminal of all capacitor cell C1 ~ CN in three electric capacity row (R1, R2 and R3) and elecrtonegativity terminal tool be all electropositive terminal upper and elecrtonegativity terminal under orientation.Certainly, in other examples, the electropositive terminal of all capacitor cells in also electric capacity can being arranged and elecrtonegativity terminal tool be all elecrtonegativity terminal upper and electropositive terminal under orientation.
Wherein, all capacitor cell C1 in electric capacity row R1, C2, C3, C4, C5 ... CN is connected in parallel to each other by the flat copper bar (LP and L1) of two conductions; All capacitor cell C1 in electric capacity row R2, C2, C3, C4, C5 ... CN is connected in parallel to each other by the flat copper bar (L1 and L2) of two conductions; All capacitor cell C1 in electric capacity row R3, C2, C3, C4, C5 ... CN is connected in parallel to each other by the flat copper bar (L2 and LP) of two conductions.
Then, electric capacity row R1 and electric capacity each capacitor cell of arranging R2 is one another in series by conducting electricity flat copper bar L1; Electric capacity row R2 and electric capacity each capacitor cell of arranging R3 is one another in series by conducting electricity flat copper bar L2.
Wherein, conduct electricity flat copper bar (as LP, L1, L2 and LN) in comprise the female flat copper bar LP of anode, female flat copper bar LN and 2 equipotential flat copper bar L1 and the L2 of negative terminal, as shown in Figure 3, the female flat copper bar LP of anode is electrically connected all electropositive terminals of the 1st electric capacity row (i.e. electric capacity row R1) upper N number of capacitor cell C1 ~ CN, and the female flat copper bar LN of negative terminal is electrically connected all elecrtonegativity terminals of the 3rd electric capacity row (i.e. electric capacity row R3) upper N number of capacitor cell C1 ~ CN.
In addition, two equipotential flat copper bar L1 and L2 are electrically connected at each electropositive terminal of those capacitor cells on each the elecrtonegativity terminals of those capacitor cells on an adjacent electric capacity row and another adjacent electric capacity row respectively.For example, the 1st article of equipotential flat copper bar L1 is electrically connected at each the electropositive terminal of those capacitor cells C1 ~ CN on each the elecrtonegativity terminal of those capacitor cells C1 ~ CN on an adjacent electric capacity row R1 and another adjacent electric capacity row R2.Article 2, equipotential flat copper bar L2 is electrically connected at each the electropositive terminal of those capacitor cells C1 ~ CN on each the elecrtonegativity terminal of those capacitor cells C1 ~ CN on an adjacent electric capacity row R2 and another adjacent electric capacity row R3.
Thus, the flat copper bar of multiple conductions in DC energy storage module 140 is (as LP, L1, L2 and LN) in order to connect multiple electric capacity row (as R1, R2 and R3), all capacitor cells in same electric capacity row are connected in parallel to each other, and above-mentioned multiple electric capacity row is one another in series.
Please further consult Fig. 4, it illustrates the schematic top plan view of DC energy storage module in the embodiment of Fig. 3 140 and other assemblies in frequency conversion power circuit 100.
As shown in Figure 4, in the flat copper bar of the conduction of DC energy storage module 140, the female flat copper bar LP of anode and the female flat copper bar LN of negative terminal extends and the rectification stage 120 be electrically connected in frequency conversion power circuit 100 and inverse cascade 160 respectively.
In practical application, rectification stage 120 will comprise necessary semiconductor subassembly (power is as formed the semiconductor subassembly of three-phase bridge rectifier and suitching type switching inverter) with inverse cascade 160, in this embodiment, the capacitor cell C1 ~ CN in the semiconductor subassembly of rectification stage 120 and inverse cascade 160 and above-mentioned DC energy storage module 140 is arranged on same plane.As shown in Figure 4, the side that rectification stage 120 and the semiconductor subassembly of inverse cascade 160 are arranged at DC energy storage module 140 (is right side in this example, but do not limit with this), the female flat copper bar LP of anode and the female flat copper bar LN of negative terminal is extended respectively by DC energy storage module 140 and the rectification stage 120 be electrically connected in frequency conversion power circuit 100 and inverse cascade 160.
In addition, as shown in Figure 4, frequency conversion power circuit 100 can comprise radiator 180 further, radiator 180 can be arranged at this inverse cascade, in embodiment as shown in Figure 4, the corresponding rectification stage of radiator 180 120 and inverse cascade 160 position and arrange, and the semiconductor subassembly of rectification stage 120 and inverse cascade 160 and capacitor cell C1 ~ CN and radiator 180 are arranged on same plane.
Thus, the semiconductor subassembly of rectification stage in frequency conversion power circuit 100 120 and inverse cascade 160 and each electric capacity are arranged the upper all capacitor cell C1 ~ CN of R1 ~ R3 and are all located in same plane and have preferably assembling.In addition, the rectification stage 120 be arranged on side is also easier to carry out measuring signal with the semiconductor subassembly of inverse cascade 160, has preferably test performance.
In addition, the female flat copper bar LP of the anode in the file of the present invention and female flat copper bar LN of negative terminal can be an overall flat copper bar, does not need extra cutting and connection, therefore advantage of lower cost.
In addition, the frequency conversion power circuit 100 in file of the present invention has preferably power expansion performance, when the power level of frequency conversion power circuit 100 improves, dynamically increases the number of capacitor cell in DC energy storage module 140.
For example, DC energy storage module 140 can comprise in more electric capacity row (can be greater than in preceding embodiment 3 row) and/or each electric capacity row and can comprise more capacitor cell (can be greater than in preceding embodiment N number of).
Such as, DC energy storage module 140 can comprise X electric capacity row, and each electric capacity row has Y capacitor cell, and X and N is respectively the positive integer of more than 2.Accordingly, the flat copper bar that conducts electricity then comprises the female flat copper bar of anode, the female flat copper bar of negative terminal and the flat copper bar of (X-1) bar equipotential.
Wherein the female flat copper bar of anode is electrically connected all electropositive terminals of the 1st upper Y the capacitor cell of electric capacity row.The female flat copper bar of negative terminal is electrically connected all elecrtonegativity terminals of X upper Y the capacitor cell of electric capacity row.(X-1) the flat copper bar of bar equipotential is electrically connected at each electropositive terminal of those capacitor cells on each the elecrtonegativity terminals of those capacitor cells on an adjacent electric capacity row and another adjacent electric capacity row respectively.
In above-described embodiment, by increasing the sum of electric capacity row or increasing the capacitor cell number of Single Capacitance row, dynamically can change the equivalent total capacitance value of DC energy storage module 140 easily.Comprise M electric capacity row in the module of DC energy storage disclosed in previous embodiment 140, and in all electric capacity row, the orientation of capacitance component is all identical, but file of the present invention is not as limit.
Refer to Fig. 5, it illustrates the schematic top plan view of the DC energy storage module 340 in another embodiment according to file of the present invention in frequency conversion power circuit, and the DC energy storage module 340 shown in Fig. 5 also can be applicable to the frequency conversion power circuit (as shown in Figure 1, Figure 2 with the frequency conversion power circuit 100 shown in Fig. 4) of previous embodiment.Be in preceding embodiment difference, the electric capacity row of the DC energy storage module 340 shown in Fig. 5 is divided into electric capacity row R1b, R2b, the R3b of electric capacity row R1a, R2a, R3a and the second part P2 of first part P1.
The electropositive terminal of each capacitor cell C1 ~ CN in electric capacity row R1a, R2a, the R3a of first part P1 and elecrtonegativity terminal have identical first order direction (in this example for electropositive terminal upward and elecrtonegativity terminal down).Relatively, the electric capacity row R1b of the second part P2, R2b, the electropositive terminal of each capacitor cell C1 ~ CN in R3b and elecrtonegativity terminal have identical second order direction (in this example for electropositive terminal down and elecrtonegativity terminal upward), and first order direction is relative with second order direction.That is, first part P1 is specular and direction is contrary haply with the capacitor cell C1 ~ CN of the second part P2.
In the embodiment of Fig. 5, the capacitor cell of DC energy storage module 340 comprises 2 × 3 × N number of capacitor cell, and first part P1 and second part P2 comprises 3 electric capacity respectively and arranges, and each electric capacity row has N number of capacitor cell.The package of conduction flat copper is containing the female flat copper bar LP of anode, the flat copper bar of female flat copper bar LN and 2 equipotential of negative terminal.
The female flat copper bar LP of anode is electrically connected all electropositive terminals of the upper capacitor cell C1 ~ CN of the 3rd electric capacity row (i.e. R3b) of the 1st electric capacity row (i.e. R1a) upper capacitor cell C1 ~ CN and second part P2 of first part P1.
The female flat copper bar LN of negative terminal is electrically connected all elecrtonegativity terminals of the upper capacitor cell C1 ~ CN of the 1st electric capacity row (i.e. R1b) of the 3rd electric capacity row (i.e. R3a) upper capacitor cell C1 ~ CN and second part P2 of first part P1.
In addition, 2 flat copper bars of equipotential (i.e. L1 and L2) are electrically connected at each the electropositive terminal of those capacitor cells that each the elecrtonegativity terminals of those capacitor cells that an adjacent electric capacity is arranged in first part P1 and second part P2 and another adjacent electric capacity are arranged respectively.
For example, the 2nd electric capacity of the 1st article of flat copper bar L1 of equipotential is electrically connected at the elecrtonegativity terminal of the 1st upper those capacitor cells C1 ~ CN of electric capacity row R1a of first part P1 respectively, the electropositive terminal of the 2nd upper those capacitor cells C1 ~ CN of electric capacity row R2a of Part I P1, the 3rd electric capacity of Part II P2 arrange those capacitor cells C1 ~ CN on R3b elecrtonegativity terminal and Part II P2 arranges the electropositive terminal of those capacitor cells C1 ~ CN on R2b.On the other hand, article 2, the flat copper bar L2 of equipotential connected mode can the rest may be inferred, be electrically connected at the elecrtonegativity terminal of upper those capacitor cells C1 ~ CN of the 2nd electric capacity row R2a of first part P1 respectively, the 1st electric capacity of elecrtonegativity terminal and Part II P2 that the electropositive terminal of the 3rd upper those capacitor cells C1 ~ CN of electric capacity row R3a of Part I P1, the 2nd electric capacity of Part II P2 arrange those capacitor cells C1 ~ CN on R2b arrange the electropositive terminal of those capacitor cells C1 ~ CN on R1b.
In addition, in the embodiment of Fig. 5, the electric capacity of first part P1 and second part P2 adjusts with arranging total adaptability, and the also adaptability ground adjustment of the capacitor cell number of each electric capacity row.
That is, in another embodiment, first part P1 and second part P2 can comprise X electric capacity respectively and arrange (not shown), each electric capacity row have Y capacitor cell (not shown), that is comprise 2 × X × Y capacitor cell altogether, X and Y is respectively the positive integer of more than 2.In this example, the package of conduction flat copper is containing the female flat copper bar LP of anode, the female flat copper bar LN of negative terminal and the flat copper bar of (X-1) bar equipotential.The female flat copper bar LP of anode is electrically connected all electropositive terminals of the 1st the upper each capacitor cell of electric capacity row of this first part and X the upper each capacitor cell of electric capacity row of the second part; The female flat copper bar LN of negative terminal is electrically connected all elecrtonegativity terminals of X the upper each capacitor cell of electric capacity row of first part P1 and the 1st the upper each capacitor cell of electric capacity row of the second part P2; And the flat copper bar of above-mentioned (X-1) bar equipotential is electrically connected at each electropositive terminals of those capacitor cells that each the elecrtonegativity terminals of those capacitor cells that an adjacent electric capacity is arranged in first part P1 and second part P2 and another adjacent electric capacity are arranged respectively, and (connected mode can see Fig. 5, and with reference to the detailed description in preceding embodiment, separately do not repeat at this).
On the other hand, many the flat copper bars of conduction are illustrated for convenience (as LP in previous embodiment, L1, L2 and LN) respectively there is difformity and be arranged at the diverse location in circuit layout (layout), but file of the present invention is not as limit.
See also Fig. 6, it illustrates the section graph of a relation of the flat copper bar of each conduction (as LP, L1, L2 and LN) according to another embodiment of the present invention.In the embodiment of Fig. 6, aforesaid many flat copper bars of conduction are (as LP, L1, L2 and LN) also can be of similar shape area and realize in the mode of layered stacks, such as, the female flat copper bar LP of anode, female flat copper bar LN and two equipotential flat copper bar L1 and the L2 of negative terminal is respectively from top to bottom.The female flat copper bar LP of anode, female flat copper bar LN and two equipotential flat copper bar L1 and the L2 of negative terminal are provided with the insulating barrier ISO(such as insulating paper in order to isolation to each other), when the capacitor cell C1 ~ CN of below must be connected to the flat copper bar (LP of specific conduction, L1, L2 or LN) time, connecting line T1 is run through by different length, T2, T3 or T4 just can complete electric connection.
In the embodiment of Fig. 6, the female flat copper bar LP of anode is that shape is roughly the same and mutually stacked with the female flat copper bar LN of negative terminal, and the DC energy storage module in frequency conversion power circuit can be made to have preferably stray inductance.
Based on the various embodiments described above, the present invention proposes a kind of frequency conversion power circuit and DC energy storage module wherein, DC energy storage module comprises multiple capacitor cell and to be arranged as on same plane and to be divided into multiple electric capacity to arrange, and electropositive terminal and the elecrtonegativity terminal of each capacitor cell in same electric capacity row have identical orientation.The flat copper bar of multiple conduction is in order to connect multiple electric capacity row, multiple capacitor cells in same electric capacity row are connected in parallel to each other, and multiple electric capacity row is one another in series, and the semiconductor subassembly of this rectification stage and this inverse cascade and those capacitor cells are arranged on same plane, the high-capacity direct current energy-storage module (direct current capacitor) needed for frequency conversion system of high power levels can be realized thus expediently.The DC energy storage module formed in this way, has preferably electric property, assembly performance, test performance and lower cost.For the frequency conversion power circuit system of entirety, there is preferably power density, heat dispersion, assembly performance, power expansion and lower cost.
Although the present invention with execution mode openly as above; but it is also not used to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when doing various changes and amendment, therefore protection scope of the present invention is when being as the criterion depending on accompanying claims protection range person of defining.

Claims (17)

1. a frequency conversion power circuit, is characterized in that, comprises:
One rectification stage, is electrically connected to a power input end;
One inverse cascade, is electrically connected to a power output end; And
One direct current energy-storage module, is electrically connected between this rectification stage and this inverse cascade, and wherein this DC energy storage module comprises:
Multiple capacitor cell, those capacitor cells to be arranged as on same plane and to be divided into multiple electric capacity to arrange, each capacitor cell has an electropositive terminal and an elecrtonegativity terminal respectively, and this electropositive terminal and this elecrtonegativity terminal of each capacitor cell in same electric capacity row have identical orientation; And
The flat copper bar of multiple conduction, in order to connect those electric capacity row, makes the capacitor cell in same electric capacity row be connected in parallel to each other, and those electric capacity row is one another in series.
2. frequency conversion power circuit as claimed in claim 1, is characterized in that, those capacitor cells comprise X electric capacity row, and each electric capacity row has Y capacitor cell, and X and Y is respectively the positive integer being greater than 2.
3. frequency conversion power circuit as claimed in claim 2, it is characterized in that, those conduction flat copper packages are containing the female flat copper bar of an anode, the female flat copper bar of a negative terminal and the flat copper bar of (X-1) bar equipotential, wherein the female flat copper bar of this anode is electrically connected all electropositive terminal to one first current potential terminals of this Y capacitor cell on the 1st electric capacity row, and the female flat copper bar of this negative terminal is electrically connected all elecrtonegativity terminal to one second current potential terminals of this Y capacitor cell on X electric capacity row.
4. frequency conversion power circuit as claimed in claim 3, it is characterized in that, each the electropositive terminals of those capacitor cells on each the elecrtonegativity terminals of those capacitor cells on an adjacent electric capacity row and another adjacent electric capacity row should be electrically connected at respectively by (X-1) bar equipotential flat cable copper bar.
5. frequency conversion power circuit as claimed in claim 1, it is characterized in that, those electric capacity row is divided into multiple electric capacity row of a first part and multiple electric capacity rows of one second part, this electropositive terminal and this elecrtonegativity terminal of each capacitor cell in those electric capacity row of this first part have identical first order direction, this electropositive terminal and this elecrtonegativity terminal of each capacitor cell in those electric capacity row of this second part have identical second order direction, and this first order direction is relative with this second order direction.
6. frequency conversion power circuit as claimed in claim 5, is characterized in that, this first part and those electric capacity of this second part are arranged and comprised X electric capacity respectively and arrange, and each electric capacity has Y capacitor cell on arranging, and X and Y is respectively the positive integer being greater than 2.
7. frequency conversion power circuit as claimed in claim 6, it is characterized in that, those conduction flat copper packages are containing the female flat copper bar of an anode, the female flat copper bar of one negative terminal and the flat copper bar of (X-1) bar equipotential, wherein the female flat copper bar of this anode is electrically connected all electropositive terminals of the 1st electric capacity row those capacitor cells upper of this first part and X electric capacity row those capacitor cells upper of this second part, the female flat copper bar of this negative terminal is electrically connected all elecrtonegativity terminals of X electric capacity row those capacitor cells upper of this first part and the 1st electric capacity row those capacitor cells upper of this second part.
8. frequency conversion power circuit as claimed in claim 7, it is characterized in that, the 1st article of flat copper bar of equipotential is electrically connected at the electropositive terminal of the elecrtonegativity terminal of the 1st electric capacity row those capacitor cells upper of this first part, the electropositive terminal of the 2nd electric capacity row those capacitor cells upper of this Part I, the elecrtonegativity terminal of the 3rd electric capacity row those capacitor cells upper of this Part II and the 2nd electric capacity row those capacitor cells upper of this Part II respectively.
9. frequency conversion power circuit as claimed in claim 1, it is characterized in that, semiconductor subassembly and those capacitor cells of this rectification stage and this inverse cascade are arranged on same plane.
10. frequency conversion power circuit as claimed in claim 9, is characterized in that, also comprise a radiator, be arranged at this inverse cascade, and the semiconductor subassembly of this rectification stage and this inverse cascade and those capacitor cells are arranged on same plane with this radiator.
11. frequency conversion power circuits as claimed in claim 1, it is characterized in that, those capacitor cells are respectively an electrolytic capacitor.
12. 1 kinds of frequency conversion power circuits, is characterized in that, comprise:
One rectification stage, is electrically connected to a power input end;
One inverse cascade, is electrically connected to a power output end; And
One direct current energy-storage module, is electrically connected between this rectification stage and this inverse cascade, and wherein this DC energy storage module comprises:
Multiple capacitor cell, those capacitor cells to be arranged as on same plane and to be divided into multiple electric capacity to arrange, semiconductor subassembly and those capacitor cells of this rectification stage and this inverse cascade are arranged on same plane, each capacitor cell has an electropositive terminal and an elecrtonegativity terminal respectively, this electropositive terminal and this elecrtonegativity terminal of each capacitor cell in same electric capacity row have identical orientation, wherein those capacitor cells comprise X electric capacity row, each electric capacity row has Y capacitor cell, and X and Y is respectively the positive integer being greater than 2; And
The flat copper bar of multiple conduction, in order to connect those electric capacity row, those conduction flat copper packages are containing the female flat copper bar of an anode, the female flat copper bar of one negative terminal and the flat copper bar of (X-1) bar equipotential, wherein the female flat copper bar of this anode is electrically connected all electropositive terminals of the 1st upper this Y capacitor cell of electric capacity row, the female flat copper bar of this negative terminal is electrically connected all elecrtonegativity terminals of X upper this Y capacitor cell of electric capacity row, the flat copper bar of this X-1 bar equipotential is electrically connected at each electropositive terminal of those capacitor cells on each the elecrtonegativity terminals of those capacitor cells on an adjacent electric capacity row and another adjacent electric capacity row respectively, those conduct electricity flat copper bar in order to make same electric capacity arrange in capacitor cell be connected in parallel to each other, and those electric capacity row is one another in series.
13. frequency conversion power circuits as claimed in claim 12, is characterized in that, also comprise a radiator, be arranged at this inverse cascade, and the semiconductor subassembly of this rectification stage and this inverse cascade and those capacitor cells are arranged on same plane with this radiator.
14. frequency conversion power circuits as claimed in claim 12, it is characterized in that, those capacitor cells are respectively an electrolytic capacitor.
15. 1 kinds of DC energy storage devices, be applicable to a frequency conversion power circuit and comprise a rectification stage and an inverse cascade, it is characterized in that, this DC energy storage device comprises:
Multiple capacitor cell, be electrically connected between this rectification stage and this inverse cascade, those capacitor cells to be arranged as on same plane and to be divided into multiple electric capacity to arrange, each capacitor cell has an electropositive terminal and an elecrtonegativity terminal respectively, and this electropositive terminal and this elecrtonegativity terminal of each capacitor cell in same electric capacity row have identical orientation; And
The flat copper bar of multiple conduction, in order to connect those electric capacity row, makes the capacitor cell in same electric capacity row be connected in parallel to each other, and those electric capacity row is one another in series.
16. DC energy storage devices as claimed in claim 15, is characterized in that, also comprise a radiator, be arranged at this inverse cascade, and the semiconductor subassembly of this rectification stage and this inverse cascade and those capacitor cells are arranged on same plane with this radiator.
17. DC energy storage devices as claimed in claim 15, it is characterized in that, those capacitor cells are respectively an electrolytic capacitor.
CN201310211948.7A 2013-05-31 2013-05-31 Frequency conversion power circuit and DC energy storage device Active CN104218817B (en)

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CN101420171A (en) * 2008-10-11 2009-04-29 中国科学院近代物理研究所 Method for stacked bus-bar of large power switch power supply
CN201887671U (en) * 2010-12-09 2011-06-29 三垦力达电气(江阴)有限公司 Power unit for frequency converter
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